Mary L. MacDonald has had extensive experience preparing heritage resource impact assessments and thematic histories for public and private clients, pursuant to the Ontario Heritage Act, the Planning Act and Environmental Assessment Act. Ms MacDonald has assumed project management and research duties (including background historical research, field survey, inventory recording and report writing) in a variety of settings, including the assessment of heritage bridges, buildings, waterways and roadways. With an honours B.A. in Celtic Studies, an M.A. in gender history and Doctoral work in Canadian social and medical history, Mary L. MacDonalds background is diverse. At the local level she has participated in heritage conservation district studies, archaeological master plans and resource assessments, and has provided research for biographies and historically informed litigation. Areas of specialization include Ontario history, the history of psychiatry, and North American juvenile detention facilities.